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Table 8 Raw scores for PKU (N = 50–56) and controls (N = 49); Highlighted results are significantly different between the two groups (see Table 2)

From: Adult cognitive outcomes in phenylketonuria: explaining causes of variability beyond average Phe levels

  PKU raw score Controls raw score
Mean SD Mean SD
Visual attention RTs
 Simple Detection - ms. 329.3 49.9 315.5 52.0
 Detention with Distractors – ms. 464.2 93.0 411.8 63.8
 Feature Search – ms. 661.5 217.9 532.2 98.5
 Conjunction Search m. 1062.7 246.6 878.3 165.4
Visual attention accuracy
 Detention with Distractors - % errors 0.8 1.0 0.6 0.9
 Feature Search - % errors 1.6 3.5 1.5 2.1
 Conjunction Search - % errors 2.2 3.5 1.6 4.5
Visuo-motor coordination
 Pegboard (sec.) 73.6 13.1 67.6 7.9
 Digit Symbol (%errors in 90 s.) 38.9 11.7 26.0 10.0
 Trail-Making Test A: (sec.) 27.6 12.0 23.8 9.6
 Executive functions
  WCST
 Total errors 13.9 7.7 11.9 5.2
 Perseverative responses 7.7 4.5 7.2 4.0
 N of Completed Categories 3.9 1.1 4.3 0.9
Trail-Making Tests
 B (sec.) 56.2 29.2 45.9 17.5
 B-A (sec.) 28.7 23.2 22.1 13.2
Verbal Fluency
 Letter (correct answers) 37.0 11.1 44.0 11.9
 Semantic (correct answers) 20.9 5.7 24.4 4.52
Short term memory
 Digit span 6.0 1.0 6.3 1.0
 Corsi Block span 5.5 0.9 5.4 1.0
Sustained attention
 RVP (% of errors) 20.6 11.8 14.3 9.1
Learning
  Rey Auditory Verbal Learning Test
 Trial A1-A5 (% errors) 22.8 10.4 20.2 7.5
 Retention (% errors A6) 17.9 14.5 12.9 13.8
 Delayed Recall (% errors) 14.0 14.3 11.2 13.4
Paired Associate Visual learning
 (% errors) 2.8 3.3 1.7 1.7